Signum
H - Social Science
8 516
R - Medicine
4 429
L - Education
4 397
Q - Science
4 187
P - Language and Literature
3 407
S - Agriculture
3 061
B - Philosophy, Psychology, Religion
2 965
T - Technology
2 767
K - Law
2 062
J - Political Science
1 619
G - Geography, Anthropology, Recreation
1 135
F - General American History
715
N - Fine Arts
700
D - World History
518
Z - Library Science
508
A - General Works
407
C - Historical Sciences
296
E - United States History
87
M - Music
85
U - Military Science
56
V - Naval Science
7